EP3959115A1 - Arbre de direction réglable en longueur pour un véhicule à moteur et douille profilée pour un arbre de direction - Google Patents

Arbre de direction réglable en longueur pour un véhicule à moteur et douille profilée pour un arbre de direction

Info

Publication number
EP3959115A1
EP3959115A1 EP20721192.1A EP20721192A EP3959115A1 EP 3959115 A1 EP3959115 A1 EP 3959115A1 EP 20721192 A EP20721192 A EP 20721192A EP 3959115 A1 EP3959115 A1 EP 3959115A1
Authority
EP
European Patent Office
Prior art keywords
section
shaft
space
inner shaft
steering shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20721192.1A
Other languages
German (de)
English (en)
Other versions
EP3959115B1 (fr
Inventor
Bernhard Jäger
Michael Bugl
Jochen Klekler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp AG
ThyssenKrupp Presta AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Presta AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp AG, ThyssenKrupp Presta AG filed Critical ThyssenKrupp AG
Publication of EP3959115A1 publication Critical patent/EP3959115A1/fr
Application granted granted Critical
Publication of EP3959115B1 publication Critical patent/EP3959115B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/185—Steering columns yieldable or adjustable, e.g. tiltable adjustable by axial displacement, e.g. telescopically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/261—Moulds having tubular mould cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/02—Sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/03—Shafts; Axles telescopic
    • F16C3/035—Shafts; Axles telescopic with built-in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0007—Casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/12—Mounting or assembling

Definitions

  • the invention relates to a variable-length steering shaft for a motor vehicle, comprising a hollow outer shaft with an out-of-round inner cross-section, in which an inner shaft is accommodated in a torque-fitting and axially movable manner, a profile sleeve being arranged between the inner shaft and the outer shaft, which has a fastening connected to the inner shaft has supply section, and the inner shaft is at least partially formed out as a hollow shaft, which has an open to the end immersed in the outer shaft inner space
  • telescopic steering shafts are known in which at least one shaft section is designed to be adjustable in length, for a length adjustment in the longitudinal or Axialrich device.
  • a length-adjustable steering shaft can form the steering spindle on the driver's side or the intermediate steering shaft between the steering spindle and the Lenkge drives.
  • a generic steering shaft which is described, for example, in DE 10 2017 201 709 A1, has an outer shaft designed as a hollow shaft into which an inner shaft is axially displaceably immersed in a telescopic manner.
  • the inner shaft has a transmission section with a non-circular cross-sectional profile, for example a toothing section with axially extending teeth, which engages with torque in a corresponding inner profile, for example a corresponding internal toothing of the outer shaft.
  • the inner shaft can also be tubular, at least in sections, as a hollow shaft, preferably in the area of the transmission section, the interior having an opening on the face at the end that extends into the outer shaft.
  • a sliding sleeve which as a profile sleeve at least partially in the area of the torque-transmitting transmission cross-section between the inner and inner shaft Au OTwelle is arranged.
  • the profile sleeve is made of a material that slides well on steel, preferably a plastic such as polypropylene (PP), polytetrafluoroethylene (PTFE) or the like Chen manufactured or coated therewith, and at least partially encloses the projection section and extends, for example, axially over part of the toothed section.
  • PP polypropylene
  • PTFE polytetrafluoroethylene
  • the profile sleeve has a fastening section which is connected to the inner shaft.
  • at least one fastening element is on the outside of the inner shaft, which is connected to a fastening section surrounding the inner shaft on the outside.
  • a protrusion protruding outward from the inner shaft, positively holding the profile sleeve or axially supporting, or a recess made from the outside into the inner shaft, into which the fastening section engages.
  • variable-length steering shaft for a motor vehicle, comprising a hollow outer shaft with a non-circular inner cross-section, in which an inner shaft is held in a torque-locking and axially movable manner, a profile sleeve being arranged between the inner shaft and the outer shaft, which has a fastening section connected to the inner shaft has, and the inner shaft is at least partially designed as a hollow shaft which has an interior open to the end dipping into the outer shaft, the invention provides that the fastening section extends from the end into the interior of the inner shaft and ver with an inner surface of the interior is bound.
  • An out-of-round internal cross-section is to be understood as any shape that deviates from a circular cylindrical shape.
  • the fastening section of the profile sleeve is connected to the inner surface of the interior in such a way that the profile sleeve is fixed in one direction at least in the direction of the longitudinal axis of the inner shaft. This prevents relative displacement of the profile sleeve with respect to the inner shaft in one direction of the longitudinal direction. It can thus be effectively prevented that the profile sleeve is brought into an unwanted relative position with respect to the inner shaft, in other words, an unwanted separation of the profile sleeve and inner shaft is prevented.
  • the fastening section of the profile sleeve with the hollow inner shaft is from the inside, i.e. connected in their interior, and not as in the prior art from the outside.
  • the profile sleeve has a bearing area which at least partially encloses the inner shaft on the outside, which in the assembled state is arranged in the torque-transmitting section between the inner and outer shaft and has the sliding bearing surfaces.
  • the profile sleeve has a fastening section connected to the bearing area, which, however, is not externally as in the prior art, i. E. is connected to the outer circumferential surface or the end face of the inner shaft, but according to the invention in the interior is connected to an inner surface in the interior of the hollow inner shaft, and is fixed there at least in the axial direction with the inner shaft.
  • the fastening section according to the invention is displaced into the interior of the inner shaft means that no additional axial section is required outside for fixing, and a greater length is accordingly available on the outside of the inner shaft for the bearing area.
  • the profile sleeve can extend over a larger axial bearing area with the same length, preferably over the toothing, or the inner shaft can be made shorter in itself in order to enable deeper immersion into the outer shaft.
  • the path made available for energy absorption can advantageously be increased without changing the bearing properties of the profile sleeve.
  • energy absorption is in the steering shaft according to the invention an optional device that is not essential to the rea ization of the teaching of the invention.
  • the bearing area of the profile sleeve according to the invention encloses the inner shaft at least in sections from the outside in the area of the torque-transmitting, non-circular area, for example the toothing.
  • the profile sleeve is preferably connected via a connecting portion to the fastening portion, which extends through the front opening back into the interior of the inner shaft, where it is according to the invention connected from the inside to the inner shaft.
  • the profile sleeve engages around the open end of the inner shaft in such a way that the wall of the inner shaft tubular in this section is arranged between the radially inner fastening section and the radially outer bearing section.
  • the bearing section preferably has a cross section which corresponds to the cross section of the area of the inner shaft on which the bearing section is arranged.
  • the bearing section is preferably tubular and has a non-circular cross-sectional profile.
  • the bearing section is preferably shorter than the inner shaft.
  • the inner shaft is preferably of tubular design, at least in sections, and has an end-face opening to the interior space at its end that extends into the outer shaft.
  • the transmission section which can preferably be designed as a toothing section, is preferably located at the end.
  • the profile sleeve according to the invention can then extend outside on the inner shaft in one direction up to the end of the Veryakungsab section, where it is preferably connected via a connecting section with a fastening section that dips in the opposite direction in said frontal opening and is in the Interior of the inner shaft extends.
  • the profile sleeve engages the edge of the front opening and the fastening section extends back into the open cross section of the profile sleeve, so that when it is attached to the inner shaft, the profile sleeve surrounds the inner shaft in the area of the toothed section, and with its transmission section immersed through the opening at the end into the interior of the inner shaft.
  • corresponding fastening means can be provided on the réellewel le and the profile sleeve.
  • the fastening means can be arranged on the section of the profile sleeve fasteners and are rich within the inner shaft in the réellebe, in which the fastening section is immersed, connected to the inner wall.
  • the inner wall preferably has corresponding connecting elements.
  • the connecting elements can be used to generate a form-fitting and / or force-fitting and / or material fit bond.
  • the fasteners arranged on the inside with respect to the inner shaft are spatially and functionally separated from the externally arranged bearing section and can be mechanically decoupled from the bearing area of the profile sleeve regardless of their mode of operation.
  • a possible deformation of the fastening section due to tolerances during production and assembly, or also due to operating conditions such as temperature fluctuations or the like, has no direct mechanical influence on the bearing section.
  • the fastening section can preferably have a radial outer surface which is connected to an inner surface which radially delimits the interior.
  • the radial outer surface is located on an outer circumferential surface of the fastening section, and is opposite an inner circumferential surface of the inner shaft in the radial direction.
  • the radial outer surface and the inner surface can preferably have connecting elements corresponding to one another to form a connection which can be loaded in the axial direction facing out of the interior.
  • the fastening section is tubular.
  • the fastening section can for example have a tube section which is connected at the end via at least one connecting section to the bearing section of the profile sleeve surrounding the inner shaft on the outside.
  • the pipe section can have a pipe socket, or it can also have a plurality of individual pipe segments divided in the circumferential direction.
  • the fastening portion extends from the open end into the open cross section of the profile sleeve back, with an annular space being formed in between, into which the end of the inner shaft can be inserted for assembly.
  • the fastening section dips axially into the interior space through the opening at the end, and the bearing section is an outer section. The fastening section of the profile sleeve thus engages around the front end of the inner shaft like a collar.
  • the cross section of the fastening section can be adapted to the inner cross section of the inner shaft so that a rotationally locking connection is generated when it is inserted, for example by means of a non-circular cross section or interlocking interlocking elements effective in the circumferential direction. It can be advantageous that mutually corresponding connecting elements that can be connected to one another are arranged on the inner surface and on the fastening section.
  • the inner shaft can have one or more connecting elements on the radial inner surface which come into connecting engagement with one or more corresponding mating connecting elements on the fastening section. These connecting elements are preferably arranged distributed regularly in the circumferential direction.
  • At least one form-locking element protruding radially inward from the inner surface into the interior is formed on the inner shaft, which form-locking element can be brought into form-locking engagement with a form-locking receptacle of the fastening section.
  • the interlocking elements of the inner shaft can have at least one radially inwardly protruding projection that engages in a corresponding interlocking receptacle radi al, which can be formed, for example, as a recess, depression or radial opening in the fastening section, or as an undercut in the axial and / or ra dialer direction.
  • the fastening section has a radially outwardly protruding form-fit element which engages from the inside into a corresponding form-fit receptacle formed on the inside in the inner wall of the inner shaft.
  • An inwardly protruding projection can preferably be produced by cold deformation of the inner wall of the interior.
  • this can be realized by an axial caulking introduced from the opening, which can be efficiently manufactured and which creates a radially inwardly protruding material bulge.
  • the adjustment can engage radially, for example, in a corresponding form-fit receptacle in the fastening section, for example an opening or breakthrough in a pipe socket dipping into the inner shaft.
  • the fastening section is cup-shaped, with an interior spaced axially from the end face arranged cup base. Seen from the front side, the cup extends concave into the interior, so that the cup base is arranged at a distance from the end within the La gerabitess of the profile sleeve, and is accordingly in the assembled state in the interior of the inner shaft.
  • the completely or at least partially closed cup bottom which extends like a plate over the cross section or at least a partial cross section of the interior, a higher stability of the profile sleeve, and also the connection with the inner shaft can be generated. For example, a projection extending through a radial opening can be supported in the axial direction against the cup base. Furthermore, the interior space can be closed by the bottom of the cup.
  • the profile sleeve is manufactured as a plastic injection-molded part from a thermoplastic polymer. This enables good sliding properties to be achieved if the inner and outer shafts are made of steel or an aluminum alloy, for example.
  • the injection point is arranged - preferably centrally - on the bottom of the cup.
  • a radially umlau Fende flow front of the plastic melt can be formed over the cup base, which runs in the axial direction first over the fastening section and then over the bearing section of the profile sleeve. This results in a uniform axial filling of the entire profile sleeve without creating weld lines due to the flow fronts meeting one another.
  • a method for producing a profile sleeve in plastic injection molding in which molten plastic melt is injected into a mold cavity of an injection mold through an injection channel at an injection point, which has an axially extending hollow profile space with a front end, provides according to the invention that at a distance from the end and with a radial distance within the hollow profile space, a disc-shaped, ra dial extended sprue space is arranged, which is connected via at least one mold channel directed axially opposite to the axial direction of the hollow profile to the end with a connection space arranged at the end that is connected to the hollow profile space, the Polymer melt is injected centrally in the axial direction into the sprue space, and is introduced axially into the hollow profile space via the molding channels and the connecting space.
  • the hollow profile space is used to shape the bearing section of the profile sleeve.
  • the profile sleeve has a cup-shaped fastening section which extends concavely from the end into the open cross section of the tubular bearing section, the disk-shaped cup base being at a distance from the end.
  • the cup- The bottom is formed in the injection mold through the said disk-shaped sprue space, which has a - preferably central - injection point. From the sprue space it extends coaxially towards the end of at least one molding channel with a tubular cross-section, or several molding channels distributed over the circumference through which the fastening section is formed.
  • This mold channel opens into an end connection space from which a further tubular mold cavity extends in the opposite direction back towards the sprue chamber, which surrounds the said mold cavity delimiting the fastening section coaxially at a radial distance and in which the bearing section is formed.
  • an advantageous embodiment provides that the plastic melt is dammed up in the sprue space and / or the connecting space before it enters the hollow profile space.
  • the sprue space has a larger internal cross section than the mold channel or channels.
  • the plastic melt can initially build up in the sprue area during injection and then flow into the molding channel or channels at the end with a uniform axial flow front and into the adjoining connection space in which the connection section is formed.
  • a flow front closed over the circumference can then preferably spread in the axial direction over the entire hollow profile space until it is completely filled.
  • the profile sleeve for the steering shaft according to the device according to the invention is preferably produced by the method according to the invention.
  • Figure 1 shows a steering shaft according to the invention in a schematic perspective
  • FIG. 2 shows the steering shaft from FIG. 1 in part in an exploded view
  • FIG. 3 shows the inner shaft of the steering shaft according to Figures 1 and 2 and the profile sleeve in an exploded view
  • FIG. 4 shows a longitudinal section through the inner shaft according to FIGS. 2 and 3 in the assembled state
  • FIG. 5 shows a longitudinal section similar to FIG. 4 in a second angular orientation
  • FIG. 6 shows an injection mold for producing a profile sleeve according to the invention in a first phase at the beginning of the injection process
  • FIG. 7 shows the injection mold according to FIG. 6 in a second phase of the injection process
  • Figure 8 shows the injection mold according to Figure 7 in a further phase at the end of
  • Figure 9 is an axial view of a profile sleeve according to the invention.
  • FIG. 10 shows a longitudinal section through a profile sleeve according to FIG. 9.
  • FIG. 1 shows a length-adjustable steering shaft 1 which extends along an axis L (longitudinal axis) and has an inner shaft 2 and an outer shaft 3.
  • the outer shaft 3 has at its outer end on the right in the drawing a connection section 31 for a rotationally locking connection with a vehicle steering system, not shown, for example with a steering shaft of a steering column.
  • a clampable fork can be used for this purpose.
  • the outer shaft 3 On its side facing the inner shaft 2, the outer shaft 3 is designed as a hollow shaft which, in its opening 32 open towards the inner shaft 2 (see FIG. 2), has internal teeth with teeth extending radially inward and extending in the longitudinal direction. The teeth are formed in the outer shaft 3 by deformations introduced into the outer shaft 3 from the outside.
  • the inner shaft 2 has at its outer end facing away from the outer shaft 3 to a connection section 21, for example a fork for rotationally locking connection with a further shaft of a vehicle steering system, not shown.
  • the fork forms part of a universal joint, not shown.
  • the inner shaft 2 has a toothed section 22 which has external toothing with teeth extending in the longitudinal direction, which can be seen in FIGS. 2, 3, 4 and 5.
  • the toothed section 22 preferably extends over a partial area of the inner shaft 2.
  • a profile sleeve 4 according to the invention is attached to the toothed section 22. With a bearing section 41, the profile sleeve 4 closes an end region of the toothed section 22 from the outside, the wall of the bearing section 41 following the contour of the teeth in cross-section, i.e. being designed to correspond to the toothed profile of the toothed section 22.
  • the inner shaft 2 With the toothed section 22 and the profile sleeve 4 attached to it, the inner shaft 2 is inserted axially for assembly into the opening 32 of the outer shaft 3, as indicated in Figure 2 with the arrow.
  • the toothed section 22 engages with the profile sleeve 4 attached to it in a rotationally locking manner in the internal toothing of the outer shaft 3, the bearing section 41 being located between the toothed section 22 and the internal toothing.
  • the inner shaft 2 and the outer shaft 3 are rotationally locked for the transmission of torque, but are axially movable for length compensation between the connection sections 21 and 31, as indicated in FIG. 1 with the double arrow.
  • the inner shaft 2 and the outer shaft 3 are usually made of steel, and the profile sleeve 4 is made of a plastic, preferably a thermoplastic polymer in the injection molding process, so that the bearing section 41 creates a smooth sliding bearing for the adjustment in the longitudinal direction. But it is also conceivable and possible to manufacture the inner shaft 2 and / or the outer shaft 3 from an aluminum alloy.
  • FIG. 3 shows the profile sleeve 4 separated from the inner shaft 2.
  • Figures 4 and 5 show the toothed section 22 with the profile sleeve 4 fixed thereon in different orientations with respect to the axis L.
  • the inner shaft 2 is designed as a hollow shaft in the region of the toothed section 22, with an interior space 23 which is open at the end and which, in the assembled state, has an opening open towards the outer shaft 3. From the sections shown in FIGS. 4 and 5, which reproduce the assembled state of FIG. 2, it can be seen that the bearing section 41 extends over the toothed section 21, lying on the outside. According to the invention, the profile sleeve 4 has a fastening section 42 which dips into the interior 23 of the inner shaft 2 through the axial opening on the end face. The fastening section 42 is connected to the bearing section 41 via an end connection section 43.
  • the fastening section 42 is cup-shaped and has a tube section 44 and a cup base 45.
  • the pipe section 44 extends through the opening on the end face along the inner wall into the interior space 23, the disc-shaped cup base 45 being at a distance from the end in the interior space 23.
  • the end region of the wall of the inner shaft 2, which is hollow in this area and which has the toothed section 21, is located radially between the fastening section 42 and the bearing section 21.
  • the fastening section 42 engages around the end of the inner shaft 2.
  • the fastening section 42 has radial recesses 46 on its outer circumference, which can be designed as openings in the tube section 44.
  • the inner shaft 2 has radially inwardly projecting projections 24 into the interior.
  • the projections 24 engage in a form-fitting manner in the radial recesses 46, so that a form-fitting connection effective in the axial direction is generated in which the projections 24 cooperate positively in the axial direction, i.e. in the direction of the longitudinal axis L, with the base section 45 and with this in Engagement.
  • several - in the example shown four - are arranged in front of jumps 24 and corresponding recesses 46 distributed over the circumference, preferably arranged distributed evenly over the circumference.
  • Two or three or four recesses 46 are preferably provided and projections 24 in a correspondingly equal number to match the number of recesses 46.
  • the projections 24 can be designed as plastic caulking, which can be cold formed in the front edge of the interior 23.
  • the formation of the protrusions 24 and the engagement in the recesses 46 can be seen particularly well in FIG. 5, which shows a section through form-fit connections lying in the plane of the section.
  • a profile sleeve 2 according to the invention is shown separately in an axial view in FIG. 9, and in longitudinal section in FIG. 10.
  • the cup-shaped fastening section 42 with the tube section 44 and the radial recesses 46 formed as openings therein are clearly visible.
  • the recesses 46 can preferably adjoin the cup base 45.
  • a sprue pin 47 is located centrally on the cup base 45.
  • FIGS. 6, 7 and 8 show an injection mold 5 schematically in section in successive filling states.
  • a mold cavity is formed between an outer mold 51 and a core 52, which mold cavity comprises a hollow profile space 53 for the bearing section 21, which is connected to a connecting space 54 for forming the connecting section 43.
  • Form channels 55 which delimit the pipe section 44, are connected to it at the end.
  • the molding channels 55 start from a sprue space 56, which lies within the hollow profile space 53 and delimits the disk-shaped cup base 45.
  • a sprue channel 57 opens centrally from the outside into the sprue space 56, through which the molten plastic is injected at a central sprue point.
  • the plastic melt is shown in cross-hatching.
  • the plastic is injected centrally into the sprue space 56 via the sprue 57, and spreads radially outwards in all directions, as indicated by the arrows. From there, the plastic melt passes into the molding channels 55, and from there into the connecting space 54.
  • the connecting space 54 is filled, the flow front, which is closed over the circumference, moves in the axial direction into the hollow profile space 53, as shown in FIG this is completely filled, as shown in FIG.
  • the core 52 can then be pulled axially out of the outer mold 51 in the direction of the arrow, and after the plastic melt has solidified, the finished profile sleeve 4 can be removed.
  • the plastic melt is dammed up during injection, and it is ensured that a flow front that is closed in the circumferential direction is formed, which causes a uniform axial filling of the hollow profile space 53 without undesired weld lines.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un arbre de direction réglable en longueur pour un véhicule à moteur, comprenant un arbre extérieur creux (3) à section transversale intérieure non ronde dans lequel est reçu un arbre intérieur (2) de manière non solidaire en couple et à déplacement axial, une douille profilée (4) qui présente une partie de fixation (42) reliée à l'arbre intérieur (2) étant agencée entre l'arbre intérieur (2) et l'arbre extérieur (3), et l'arbre intérieur (2) se présentant au moins par endroits sous forme d'arbre creux qui présente un espace intérieur (23) ouvert en direction d'une extrémité faisant saillie dans l'arbre extérieur (3). L'invention vise à réduire la complexité de fabrication et de montage. A cet effet, selon l'invention la partie de fixation (42) s'étend de l'extrémité jusque dans l'espace intérieur (23) de l'arbre intérieur (2) et est reliée à une surface intérieure de l'espace intérieur (23).
EP20721192.1A 2019-04-23 2020-04-22 Arbre de direction réglable en longueur pour un véhicule à moteur et douille profilée pour un arbre de direction Active EP3959115B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019205784.5A DE102019205784B3 (de) 2019-04-23 2019-04-23 Längenverstellbare Lenkwelle für ein Kraftfahrzeug und Profilhülse für eine Lenkwelle
PCT/EP2020/061163 WO2020216771A1 (fr) 2019-04-23 2020-04-22 Arbre de direction réglable en longueur pour un véhicule à moteur et douille profilée pour un arbre de direction

Publications (2)

Publication Number Publication Date
EP3959115A1 true EP3959115A1 (fr) 2022-03-02
EP3959115B1 EP3959115B1 (fr) 2024-05-01

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EP20721192.1A Active EP3959115B1 (fr) 2019-04-23 2020-04-22 Arbre de direction réglable en longueur pour un véhicule à moteur et douille profilée pour un arbre de direction

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US (1) US11697448B2 (fr)
EP (1) EP3959115B1 (fr)
CN (1) CN113727904B (fr)
DE (1) DE102019205784B3 (fr)
WO (1) WO2020216771A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11383755B2 (en) * 2020-12-16 2022-07-12 Steering Solutions Ip Holding Corporation Steering shaft assembly and method of assembling same
CN114751327A (zh) * 2022-03-24 2022-07-15 自然资源部第一海洋研究所 海洋浮标自动布放回收绞车

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466097A (en) * 1948-08-23 1949-04-05 Lyle H Graue Adapter coupling
DE19807666A1 (de) 1998-02-25 1999-08-26 Lemfoerder Metallwaren Ag Teleskopierbare Lenksäule für Kraftfahrzeuge
FR2830912B1 (fr) 2001-10-15 2003-12-19 Nacam Dispositif d'accouplement en rotation de deux arbres telescopiques
US8127639B2 (en) * 2005-08-16 2012-03-06 Steering Solutions IP Holding Company, a Delaware corporation Sleeve bearing for collapsible steering column
DE102007060149A1 (de) * 2007-12-13 2009-06-18 GM Global Technology Operations, Inc., Detroit Teleskopierbare Lenkspindelanordnung
DE102008005256B4 (de) * 2008-01-18 2009-10-22 Thyssenkrupp Presta Ag Lenksäule mit Kunststoffgleithülse
ES2381826B1 (es) 2010-02-03 2013-05-27 Melchor Daumal Castellon Procedimiento de fabricacion de un arbol telescopico y arbol telescopico resultante de dicho procedimiento
DE102010049106A1 (de) * 2010-10-21 2011-06-09 Daimler Ag Schiebehülsenrohling und Kraftfahrzeug-Lenkspindelanordnung mit aus dem Rohling gefertigter Schiebehülse
JP5890690B2 (ja) 2012-01-12 2016-03-22 株式会社山田製作所 ステアリングシャフト
IN2015MN00046A (fr) * 2012-06-19 2015-10-16 Nitta Corp
DE102014104191B3 (de) * 2014-03-26 2015-09-10 Thyssenkrupp Presta Aktiengesellschaft Welle für eine Lenkung eines Kraftfahrzeugs
DE102014115804B4 (de) 2014-10-30 2017-03-02 Thyssenkrupp Ag Schneckenrad für eine elektromechanische Hilfskraftlenkung
DE102014017555B4 (de) * 2014-11-28 2016-10-13 Thyssenkrupp Ag Lenkwelle für ein Kraftfahrzeug
DE102016203625B3 (de) 2016-03-07 2017-03-30 Thyssenkrupp Ag Verfahren zur Herstellung einer längenveränderbaren Lenkwelle und Spritzgießvorrichtung zur Durchführung des Verfahrens
DE102016203627B3 (de) * 2016-03-07 2017-03-30 Thyssenkrupp Ag Verfahren zur Herstellung einer längenveränderbaren Lenkwelle und Spritzgießvorrichtung zur Durchführung des Verfahrens
DE102016206723A1 (de) 2016-04-20 2017-10-26 Thyssenkrupp Ag Dichtungsvorrichtung
DE102016114970A1 (de) * 2016-08-11 2018-02-15 Thyssenkrupp Ag Lenkwelle für ein Kraftfahrzeug
DE102017201709A1 (de) 2017-02-02 2018-08-02 Thyssenkrupp Ag Längsverstellbare Lenkwelle für ein Kraftfahrzeug und Profilhülse für eine Lenkwelle
DE102017114534A1 (de) * 2017-06-29 2019-01-03 Thyssenkrupp Ag Lenkwelle für ein Kraftfahrzeug und Verfahren zum Herstellen
US10414426B2 (en) * 2017-08-14 2019-09-17 Steering Solutions Ip Holding Corporation Steering shaft assembly having a sleeve
US11383755B2 (en) * 2020-12-16 2022-07-12 Steering Solutions Ip Holding Corporation Steering shaft assembly and method of assembling same

Also Published As

Publication number Publication date
DE102019205784B3 (de) 2020-06-25
CN113727904A (zh) 2021-11-30
US20220144332A1 (en) 2022-05-12
WO2020216771A1 (fr) 2020-10-29
CN113727904B (zh) 2023-09-05
US11697448B2 (en) 2023-07-11
EP3959115B1 (fr) 2024-05-01

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